Question

(c) What is the maximum value IV, can assum *5.84 A four-bit R-2R ladder DAC is presented in Fig. 5.103. (a) Show that the output voltage is given by LV-PV V2 V3 V4) -V, = R (2R + R + 8R+ 16R) (b) If R;= 12 kN and R = 10 k22, find IVI for [V,V2V3V4] = [1011] and [V V V3V4] = [0101). RE 2R VOLW 22 3 v20mw 22 V, — & — 2R V40W }2R Figure 5.103

Answer 1

а) 4-bir oлe tros (o en varit en hoe here Reh, Rohe, Rady, Pran Eq. Ualime Thevenin's resistance seen by V., V., V. v. respectively Ros Seen by V, Cshoro all other sources 22 Raya 281/20 = R te pe seen by (shon remaining sour L K Vo =(9)C)

- R , = seen by ۔ :) را =) Rahes sean by Vy as وه له: (۸) ودم امام مہم , Vg = Durto v, & tv + V - () : (۱۰۱] ۱۰ تا ۷ ۷ ۷ (ط)| 24 : 12 . = Rolok 1 + 1 (+ + (ا ا ه -- ده لام | که , t9 1 ++ + 1 = -0.37sv